org.hibernate.hql.ast.QuerySyntaxException: Person is not mapped
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org.hibernate.hql.ast.QuerySyntaxException: Person is not mapped [select o from Person o.....
Spring+struts+JPA
发生这个错误除了其他人所说hibernate配置之类的错误外(没有用到hibernate，使用JPA)，也有可能是因为实体类Person没有使用@Entity来标注；
根据JPA规范，需要将Person类加上标注@Entity，通过这个注解，指明Person为实体类。
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